What is a Covered Lagoon?
A covered lagoon, also referred to as an anaerobic lagoon, is an earthen impoundment receiving manure from an animal feeding operation in which manure is stored and stabilized by bacterial activity operating without oxygen (compare with an aerobic structure).
More specifically, a covered lagoon does not include a confinement feeding operation structure such as an earthen manure storage basin; a basin connected to unroofed operations (feedlots) which collects and stores runoff produced by rain or a system which collects and treats off gases.
Following is a cross-section diagram of a covered lagoon: